EP 1567890 A1 20050831 - APPARARUS AND METHOD FOR MEASURING MUD RESISTIVITY USING A DEFOCUSED ELECTRODE SYSTEM
Title (en)
APPARARUS AND METHOD FOR MEASURING MUD RESISTIVITY USING A DEFOCUSED ELECTRODE SYSTEM
Title (de)
MESSGERÄT UND METHODE ZUR MESSUNG DES WIDERSTANDES DES BOHRLOCHSCHLAMMS UNTER VERWENDUNG EINES DEFOKUSIERENDEN ELEKTRODENSYSTEMS
Title (fr)
APPAREIL ET PROCEDE DE MESURE DE LA RESISTIVITE DE LA BOUE AU MOYEN D'UN SYSTEME D'ELECTRODES DEFOCALISE
Publication
Application
Priority
- US 0314345 W 20030507
- US 14230702 A 20020509
Abstract (en)
[origin: US2003210061A1] A mud resistivity measuring device for use in a borehole includes a pair of current electrodes disposed between a pair of guard electrodes. The measure electrodes are carried on a recessed portion of a logging tool so that the measure current flows substantially along the borehole axis and is relatively insensitive to the formation resistivity. A pair of measure electrodes on the logging tool determines a voltage difference caused by the current flow in the borehole.
IPC 1-7
IPC 8 full level
G01V 3/28 (2006.01)
CPC (source: EP US)
G01V 3/28 (2013.01 - EP US)
Citation (search report)
See references of WO 03096074A1
Designated contracting state (EPC)
FR GB
DOCDB simple family (publication)
US 2003210061 A1 20031113; US 6801039 B2 20041005; AU 2003243208 A1 20031111; EP 1567890 A1 20050831; EP 1567890 B1 20070404; EP 1567890 B8 20070613; WO 03096074 A1 20031120
DOCDB simple family (application)
US 14230702 A 20020509; AU 2003243208 A 20030507; EP 03750087 A 20030507; US 0314345 W 20030507